<script>
import { useVModel } from '@vueuse/core'
import { provide } from 'vue'

export default {
  name: 'XtxTabs',
  props: {
    modelValue: {
      type: [String, Number],
      default: ''
    }
  },
  setup(props, { emit }) {
    const activeName = useVModel(props, 'modelValue', emit)
    // 点击选项卡触发函数
    const tabClick = (name, index) => {
      activeName.value = name
      emit('tab-click', { name, index })
    }
    provide('activeName', activeName)
    return { tabClick, activeName }
  },
  render() {
    // 获取插槽节点
    const panels = this.$slots.default()
    // 动态的panels组件集合
    const dynamicPanels = []
    panels.forEach(item => {
      if (item.type.name === 'XtxTabsPanel') {
        dynamicPanels.push(item)
      } else {
        item.children.forEach(item => {
          dynamicPanels.push(item)
        })
      }
    })

    const nav = <nav>
      {dynamicPanels.map((item, index) => <a onClick={() => this.tabClick(item.props.name, index)} class={{ active: item.props.name === this.modelValue }} href="javascript:;">{item.props.label}</a>)}
    </nav>
    return <div class='xtx-tabs'>{[nav, panels]}</div>
  }
}
</script>

<style lang="less">
.xtx-tabs {
  background: #fff;

  >nav {
    height: 60px;
    line-height: 60px;
    display: flex;
    border-bottom: 1px solid #f5f5f5;

    >a {
      width: 110px;
      border-right: 1px solid #f5f5f5;
      text-align: center;
      font-size: 16px;

      &.active {
        border-top: 2px solid @xtxColor;
        height: 60px;
        background: #fff;
        line-height: 56px;
      }
    }
  }
}
</style>
